If you're lowing the number of additional people an infected person infects with a disease, that's measured by a lower basic reproduction number (Rx), which was

If you're lowing the number of additional people an infected person infects with a disease, that's measured by a lower basic reproduction number (Rx), which was what the poster above was talking about. It being artificially reduction is kind of given as it a vaccine, but as the basic reproduction number is being used to measure the number of reproductions from each [known] infected person within population groups it seems like THE measure of a vaccine's impact. You seem to be talking about something else entirely.